Furnace.



R. D; MQMANIGAL.

FURNACE. APPLICATION FILED SEPT. 26, 1912.

' Patented Dec. 16, 1913.

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FURNACE.

ArPmcATi'on 11.21) SEPT. 26, 1912.

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Patentd Dec. 16,1913.

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ROBERT D. MGIVIANIGAL, OF LOGAN, OHIO, ASSIGNOR TO THE MoMANIGAL GRATELESS FURNACE COMRANY, OF COLUMBUS, OHIO.

FURNACE.

Patented Dec. 16,1913.

Serial No. 722,460.

T 0 all whom it may concern:

Be it known that I, ROBERT D. MCMANI- GAL, a citizen of the United States, residing at Logan, in the county of Hocking and State of Ohio, have invented certain new and useful Improvements in Furnaces; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable other skilled in the art to which it appertains to make and use the same.

This invention relates to improvements in furnaces.

One object of the invention is to provide a furnace having a fire box constructed and arranged in such manner as to obviate the use of a grate.

Another object is to provide a furnace having an improved construction and arrangement of coking chamber and means whereby the volatile gases produced by the coking of the coal therein as well as the products of combustion from the fire will be entirely consumed and the heat from these burning products utilized with the heat from the burning fuel for heating the furnace.

A further object is to provide a furnace of the character described having an improved arrangement of ventilating passages whereby air is supplied to the burning fuel in the fire box thus insuring a perfect combustion of the fuel.

With these and other objects in view, the invention consists of certain novel features of construction, combination and arrangement of parts as will be more fully described and claimed.

In the accompanying drawings;

Figure 1 is a vertical longitudinal section of my improved furnace as applied to a tubular boiler; Fig. 2 is a horizontal sectional view taken above the coking chamber of the furnace and on a line 2-2 of Fig. 1; Fig. 3 is partly a front end elevation and partly a vertical cross section of the furnace; Fig. 4 is a vertical cross section taken on the line 44 of Fig. 1; Fig. 5 is a horizontal sectional view taken through the wall separating the coking chamber from the ash pit showing more clearly the fiues formed therein.

In the present embodiment of the invention wherein the same is shown as being applied to a tubular boiler 1 denotes the furnace and 2 denotes the boiler the forward end of which communicates with the smoke box 3 which communicates at its upper end with the stack 4 in the usual or any suitable manner. In the front end of the furnace which in the present instance is built of masonry is arranged the fire box 5 the rear or bridge wall 6 of which extends upwardly to within a short distance from the bottom of the boiler and the upper end of the bridge wall is of openwork construction or provided with a series of vertical and horizontal longitudinal passages 7 through which the flame and heat passes and is divided and spread out over the lower surface of the boiler thus effectually increasing the heating capacity of the fire.

The lower end of the fire box 5 communicates with ash pits 8 which extend to the front end of the furnace and are provided with clean-out doors 9 through which the ashes may be removed when necessary. The doors 9 are provided with suitable draft dampers 10 as shown. The upper portion of the fire box 5 also communicates with coking chambers 11 which extend to the front end of the furnace and are provided with doors 12 throughwhich fresh fuel is supplied to the furnace. The doors 12 are also provided with suitable dampers 13 as shown. In the horizontal division wall 13 between the ash pits and the coking chambers are arranged a series of longitudinally disposed draft passages 14 which open through the front end of the furnace and communicate at their rear ends with the fire box as shown.

Any suitable number of draft passages 14 may be provided and said passages are preferably closed at their forward. ends by doors 15 having arranged therein suitable dampers 16 whereby the draft through the passages 14 to the fire box may be controlled. By providing the passages 14 it will be seen that a perfect ventilation may be provided for the fire box and the burning fuel therein supplied with a sufficient quantity of air to cause the same to burn freely and to produce a perfect combustion of the fuel.

The tops of the ash pits and coking chambers are preferably arch shaped and the arch shaped tops of the coking chambers are extended back beyond the inner side of the front wall of the furnace and over a considerable portion of the fire box as clearly with the smoke and products of combustion shown at 17 i nFig; 1 of the drawings and in the extended arched tops 17 of the coking chambers are series of vertically and radially disposed passages 18 through which the volatile gases arising from the coking coal in the coking chambers passes and commingles from the burning fuel in the fire box. Formed in the front wall of the furnace immediately above the coking chambers are a series of horizontal longitudinally disposed air passages 19 the inner ends of which communicate with the space above the extended arched tops 17 of the coking chambers and the outer ends of which are provided with doors 20 having suitable dampers 21 whereby the currents of airthrough the passages 19 are controlled. The airentering through the passages 19 mixes with the combined gases and products of combustion from the coking chambers and fire box and forms a highly combustible gas which burns freely and is entirely consumed in the space above the fire box the heat from this burning is thus utilized with the heat from the burning fuel for heating the boiler. By arranging the. bridge wall of the, furnace and extending the arched tops of the coking chambers back over the fire boxin the manner described. it will beseen that the space above the tops of the coking, chambers and below theboiler forms practically a mixing chamber for the gases and products of com= b-ustion where these gases and products to gether with the airsupply entering through the passages 19 is combined in the proper proportions for burning freely thus producing a smokeless as well as a grateless furnace.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents.

lVhile I have herein shown anddescribed the furnaceas being provided'with two coking chambers and ash pits I do not desire to be understood as limiting the structure 1 of the furnace to any particular number of coking chambers or ash pits as it is obvious 7 that I may provide any desired number of chambers and ash pits and that any suitable number of air passages 19 may also be provided.

It will also be understood that while I have herein shown and described the invention as applied to a boiler furnace it will be obvious that the same may be applied to any form of furnace or kiln.

Having thus described my invention, what I claim is 5 The combination with a coking chamber and ash pit of a furnace, of a division wall separating the same'and provided with a longitudinal draft passage opento the atmosphere, an arch also provided with a longitudinal draft passage leading --'therethrough,' an upstanding bridge wall located in rear of the coking chamber and arch and separated from the rear end of the division wall, the upper end of the upstanding wall being provided with vertical and horizontally arranged passages for the purposes described. V I

In testimony whereof I have hereunto setmy hand in presence of two subscribing witnesses.

ROBERT D. MGMANIGAL.

WVitnesses L. O. HILTON, M. H. STUARD. 

